Etude RMN de β-hydroxy-phosphonates-esters. Détermination du signe du couplage stéréospécifique 4J(PCCOH) dans le diastéréoisomère RS,RS

Des experiences d'INDOR effectuees sur le β-hydroxyphosphonate ester RS,RS en solution dans le (CD3)2CO ou (CD3)2SO montrent que le couplage 4J(PCCOH) est positif. La valeur plus elevee de ce couplage dans (CD3)2SO que dans (CD3)2CO indique qu'une geometrie en W rend le couplage plus positif. INDOR experiments indicate 4J(PCCOH) to be positive for the β-hydroxyphosphonate ester RS,RS dissolved in (CD3)2CO or (CD3)2SO. The higher value observed in (CD3)2SO than in (CD3)2CO shows that a W geometry makes this coupling constant more positive.

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